My app is ok (I'm using the hello world as is out the box), it even runs ok in the devices I plug in, but it does not goes to the emulator. I created a post a while ago about this but so far no actual help... even android learner made an appearance there.

I faced the similar problem. In my case I had created the new virtual device and had enabled the snapshot. I just unchecked the checkbox Go to AVD Manager -> Select the device -> click Editand uncheck the Enabled checkbox. I hope this works.

another suggestion for emulators: I dont prefer using the "Default" AVD, I rather use GenyMotion.